Dubas could have signed Pietrangelo and traded Marner when he had the chance...alas, it's Dubas we're talking about though...the guy has messed up this Leaf franchise as GM, and will take some shrewd tinkering by Treliving to right the ship.
Was there any indication at all that Pietro ever wanted to sign with the Leafs? Didn't seem like it so even if Dubas threw 10+ million per x 7 years I don't think he would've signed here. And at the end of the day he made the right choice when he's won a Cup with the Knights and would most likely still not be a Stanley Cup champion if he signed here.
As for Rielly I said many years ago that it was best to trade him when he was still on his 5 million contract and that re-signing him wouldn't be a great idea and that it could turn into the Phaneuf contract very quickly. Last season's playoffs made me hope that perhaps I was wrong, but now he's back to his old self and if you can trade him then TRADE HIM.
He's another Leaf player that like Marner I really like as a person, but he's just not good enough to be our top pairing Dman that you can count on to play in the critical parts of games. All these years the Leafs were trying to find a good partner for him when with a real top pairing Dman it shouldn't matter that much as to who you're playing with and usually it should be YOU helping to elevate your partner's play.